The Beta channel has been updated to 40.0.2214.91 (Platform version: 6457.78.0). This build contains a number of bug fixes, security updates, and feature enhancements.

If you find new issues, please let us know by visiting our forum or filing a bug. Interested in switching channels? Find out how. You can submit feedback using ‘Report an issue...’ in the Chrome menu (3 horizontal bars in the upper right corner of the browser).

this is a beta channel release, and won't show on a "out of the box" chromebook. There are three channels for releases : (from more frequent to less frequent) dev, beta and stable. You probably can stay on stable channel. You will get releases once every 6-8 weeks. It's the safest since features will only make its way into stable releases only after it's been through dev and beta, allowing the quirks to be fixed first.